Fill your April calendar with these healthy free events

Curious about IntenSati? Try it out for free! (Photo: I Love IntenSati)

Spring has sprung, and if you’re anything like us, you’re probably a bit more willing to drag yourself from the couch now that the temps are warmer (and bikini season is on the horizon). Fortunately, April happens to be chock-full of great fitness offerings all over this fair city of ours, and these six or so? They’re free!

Saturday, April 2

Always wanted to try IntenSati? Now’s your shot. On four Saturdays in April (except for April 23), the JCC will offer free IntenSati classes as part of its Take A Chance Series. IntenSati with Elise Green, 7:15­–8:15 p.m., JCC Manhattan, 334 Amsterdam btwn 75th and 76th Sts., Upper West Side, www.jccmanhattan.org

On hump days from April through October, inline skaters get together in Union Square for two-hours of group street skating—and this is the 2011 kick-off night! It’s free to skate with the group, but you’ve got to supply your own equipment and helmets are required. Wednesday Night Skate Kick Off, 7:45-9:45 pm, Union Square South at 14th St., Union Square, www.weskateny.org

Friday, April 22

Once a month, Dance Manhattan hosts a free class, followed by a dance party. They don’t advertise the exact style of dance or the instructor ahead of time, but we’re told students can usually expect 30 minutes of slow ballroom-type instruction, followed by 30 minutes of faster dance. Free dance class, 8 p.m, Dance Manhattan, 39 West 19th St., between Fifth and Sixth Aves., Chelsea, www.dance-manhattan.com

Birding in Brooklyn? Yes indeed! Photo via Shakespiere

Saturday, April 30

Okay, so it’s not exactly a calorie crusher, but the Brooklyn Bird Club is offering a free field walk on Pier 1, just in time to check out spring’s returning species with guides who know what to look out for. And what do New Yorkers need more than peaceful opportunity to commune with nature? Walk with Brooklyn Bird Club, 9-10:30 a.m., Pier 1 Brooklyn Bridge Park, Dumbo, www.brooklynbridgepark.org

Did we miss a free April event? Share it with us in the Comments area, below!